Gluer



Aug. 11, 1925. 1,549,576

L. E. LA BOMBARD E'r AL GLUER 51155 April e, l1921 Z0 A TTU/P/Vff Y.

CII

Patented .il-hug.. ll, i925.

reis.

LEON E. LA BMBARD AND MELVIN -I. SDEBOTHATYL OF CHELSEA, MASSACHUSETTS,

ASSIGNORS TO' SPECIALTY AUTOMATIC MACHINE CMPANY, OF CHELSEA, MASSA- CHUSETTS, A CORPORTIN OF EISSACHUSETTS.

GL'UER.

Application filed April 6, 1921. Serial No. 459,135.

To all whom t may concern:

Be it known that we, LEON E. LA Boir- BARD and MnLvIN l'l. SIDEBOTHAM, citizens of the qUnited States, and residents of Chelsea, in the county of Suolk and State of Massachusetts, have invented certain new and useful improvements in Gluers, of which the following is a. specification.

This: inventionrelates to means for applying an adhesive, hereinafter referred to generically as glue, to sheet material; the present invention being particularly designed for use in box folding machines wherein blanks are successively passed over a narrow wheel or disk and take a stripe of glue from said disk.

In the use of devices or appliances of this character, dust or fibers carried by the blanks tend to accumulate on the periphery of the disk and soon clog thereon and interfere with the transmission of a correct stripe of glue to the passing blanks. A doctor device in t-he form of a scraper does not prevent accumulation of dust or iibers on the disk because there must be sufficient space between the two to permit the disk to carry a lilin of glue past said device.

The principal object of our present invention is to provide a gluer in which it is impossible for dust or fibers to so accumulate on the rotary disk as to clog the latter and interfere with the operation of the boxfolding or other machines of which the gluer forms a part.

l/Vith the above-stated object in view and other' objects incidental thereto, as will be explained hereinafter, the invention consists in the construction and combination of parts substantially as hereinafter described and claimed:

0f the accompanying drawings Figure l is a perspective view, partly broken out of a gluing appliance constructed according to our invention.

Figure 2 is a plan View.

Figure 3 is a detail vertical sectional view on line 3-3 of Figure 2, on a smaller scale.

Figure l is a sectional elevation on line it of Figure 2.

Figure 5 is a detail sectional elevation on line .P5- 5 of Figure 2.

The glue pot or box may be of any suitable construction so far as: the present invention is concerned. As illustrated it includes four wall portions 12, 18, 14E and 15, an intermediate wall or web v16, and a cover, a portion of which is shown at 17.

Mounted in a bearing 18 carried by the web 16 isa shaft 19 carrying the glue-applying wheel or disk 2O at the end within the glue-holding portion of the pot, and having a pinion 21 at its other end. lli/leshing with the pinion 21 is a pinion 22 mounted on a stud shaft projecting from the web 16. Meshing with the pinion 22 is a pinion 23 carried by a suitable drive shaft not necessary to illustrate.

Referring to Figure 3 in connection with Figure 1, a shaft 24k is mounted in an eccentric sleeve 25 which latter is mounted to be rotatively adjusted in a bearing 26 projecting from the web 16. is indicated by comparing Figures 3 and t, the internal bore of sleeve 25 is eccentric to the bearing 26 for a purpose presently explained.

integral with or secured to the inner end of the shaft 24C is a grooved doctor roll 27. rlfhe walls of the groove in said doctor divergeand straddle the peripheral portion of the glue disk 20. In other words, the groove in the doctor is wider at its mouth than at its bottom. At its bottom the width of the groove is practically the saine as the thickness of the edge of the disk 20, the purpose of which will be presently explained.

Carried by the outer end of the shaft 24.4 is a pinion 2S which meshes with the pinion 22 so that said pinion 22 drives the pinions 21 and 28, and consequently the disk 20 and doctor 27, in the same direction as indicated by the arrows in Figure 1. rFhe proportions of the train of gearing described is such, as shown, that the doctor rotates considerably faster than the glue disk. The thickness of the film of glue which is permitted to be carried upon the periphery of the disk to applying position is controlled by the space between the bottom of the groove in the doctor and said periphery.

A dificulty experienced with many prior types of devices employing narrow glue wheels or disks which, as in box-folding machines, are required to rotate very rapidly, is that they are liable to carry suicient excess of glue on the sides of the disks to result in centrifugal force carrying some of the excess out onto the periphery, result- Ll edge of he disk that it is i edges oi corners of the disk to carry too much glue sition.

lt is, of course, desirable that shall be canable of adjul ze disk with u ie connections or means or this Ave can be adjusted rooatively e its bore forms the bearing if shaft 24, tl e said shaft and the rotary doclor can be verj accurately and finely adto the periphery of the l justed relatively disk.

To effect and maintain Jdie adjustment of the arm 219 of the eccentric sleeve, we provide a screw 30 mounted in a lug 3l rising from a plate 32 mounted on the cover of the box. rlfhe inner end of the screw bears against a lug` projecting laterally from the uiper end of the arm letween the other side of the lug and a soeke ed screw 3e mounted in another lug of he Jlate 32 is a spring 36 acting to yieldingly hold the lug 33 in contact with the adji ting screw 30.

'lo enable the rotary doctor to attain its best efficiency, it is desirable to keep it clear of excess of glue. To this end we employ a clearer' 37 which is shaped 'to conform closely to the groove in the doctor and to the periphery thereof. As illustrated, portions of the clearer also extend in close to the outer sides of the doctor. The clearer is mounted so that its relationship to the doctor remains constant regardless of adjustments of the doctor. To this end the clearer is mounted on a block 38 formed a part of a clamp ring 39 which is mounted on and secured to the innerend of the eccentric sleeve 25 (Figures l, 2 and 3) by a clamp screw 40.

Then a gluer device is left inoperative for some time, as over night, glue dries on the exposed portion of its periphery. tiem.,A times a piece of a blank is stuck thereon.. For these and other reasons it is desirable to remove from the disk any undesirable accumulation so that none will be carried around to the doctor. For this purpose we ll t,

employ a clearer to act on that portion of the periphery of the disk passing from upr or applying position down toward the glue. Said clearer, in the specific form il- Y tated, comprises a scraper Lll which is secur at its lower end (Fig. to the of the box by any suitable means as a screw An upper screw 43 l and 3) tapped through said wall and bearing against the upper portion of the scraper may be employed to vary the pressure of the tip of the scraper against the disk.

ed l2 ant function of the clearer or that it removes from the disk 2O fo "n sutstanee which might otherwise be carried down into the glue and then be carried on by the disk so as to interfere with the proper action of the doctor or be carried on to the passing blanks. lt is lon JLl/ cated at a distanoo from the point where tie disk applies glue to the box blanks or other material fed over the disk; therefore, f there is any dirt, or dried glue, or pieces of blanks, adhering to the disk, such foreign matter is removed. Consequently the periphery of the disk is cleaned after leaving implying` position, so that it will carry a clean supply of glue first to the doctor 27 and then to the point where said glue is applied to the' passing blanks.

fis is well-known, every gluer of the type referred to herein is so constructed that a peripheral portion of the glue disk or roll is exposed for the free passage of the sheet rgiaterial or blanks in a plane tangential to such peripheral portion. And to permit such passage there must be no obstruction located in the path of travel of the sheet material or blanks. Therefore, in the present structure, both the doctor 27 and the clearer or scraper 4l are below the plane of the top of the glue disk 2() so that the blanks can pass freely along said plane to receive stripes of glue the full length of the glue laps of the blanks.

lllhile the member 2O is illustrated as a disk, we do not limit ourselves thereto since its axial dimension may be such as to render the term roll more aptly descriptive.

Having now described our invention, we claim:

l. ln mechanism of the character described, a glue receptacle; a disk mounted to rotate therein, and a rotary doctor in proximity to the disk, portions of said doctor extending in close proximity to the sides of the disk.

2. ln mechanism of the character described, a glue receptacle; a glue carrier mounted to rotate therein and having a portion of its periphery exposed for the passage of sheet material in contact therewith, a rotary doctor in proximity to the carrier; means being provided for rotating the carrier and doctor in the same direction.

3. In -mechanism of the character described, a glue receptacle, a glue carrier mounted to rotate therein and having a portion of its periphery exposed for the passage of sheet material in contact there- With, a rotary doctor in proximity to the carrier, and a clearer close to the rotary doctor to remove glue therefrom.

4. In mechanism of the character described, a glue receptacle, a glue carrier mounted to rotate therein, a doctor in position to control the iilm transferred by the carrier from the glue to applying position, and a scraper in position to act on that portion of the carrier traveling from applying position to the glue.

5. In mechanism of the character described, a glue receptacle, a glue carrier, a doctor in proximity to one portion of the carrier, a scraper close to another portion ot the carrier, and means for rotating the carrier in a direction to cause its periphery to travel from the glue past the doctor, then to applying position, and then past *the scraper to the glue.

6. In mechanism of the character described, a glue receptacle, a rotary glue carrier having a portion of its periphery exposed for the passage oi sheet material in contact therewith, a doctor for the carrier, and means ior removing glue from the doctor.

7. ln mechanism of the character described, a glue receptacle, a rotary glue carrier, a doctor for the carrier, means tor removing glue rom the doctor, and independent means or removing glue from that portion of the carrier moving from applying position to the glue.

8. ln mechanism of the character described, a glue receptacle, a disk mounted to rotate therein, a rotary doctor in proximity to the disk, means for rotating the disk and doctor in the same direction, and means ior adjusting the' rotary doctor relatively to the disk.

9. In mechanism of the character described, a glue receptacle, a carrier mounted to rotate therein, a rotary doctor in proximity to the carrier, a clearer for the doctor, and means for adjusting the doctor and clearer Without disturbing their co-relationship.

l0. n mechanism of the character described, a glue receptacle, a carrier mounted to rotate therein, an adjustable member, and a doctor and a clearer tor the doctor both carried by said adjustable member.

11. n mechanism of the character described, a glue receptacle, a carrier mounted to rotate therein, and a peripherally grooved rotary doctor in proximity to the carrier.

12. In mechanism of the character described, a glue receptacle, a carrier mounted to rotate therein, and a peripherally grooved rotary doctor in proximity to the carrier, the groove in the doctor being Wider at its mouth than at its bottom.

18. ln mechanism of the character described, a glue receptacle, a carrier mounted to rotate therein7 a peripherally grooved rotary doctor in proximity to the carrier, and a clearer extending into the groove of the doctor.

la. In mechanism of the character described, a glue receptacle, a disk mounted to rotate therein, a peripherally grooved rotary doctor in proximity to the disk at one side of the axis of the latter, a scraper close to the disk at the other side of the axis of said disk, and a clearer for the rotary doctor.

15. In mechanism of the character described, a glue receptacle, a rotary glue carrier, a doctor for the carrier, and a clearer independent of the doctor and at a distance from the point Where the carrier applies glue to material fed past it, said doctor and clearer being located out of the plane of a line tangential to the periphery of the glue carrier to permit said material to receive a stripe of glue While travelling in a straight path.

16. In mechanism of the character described, a glue receptacle, a rotary glue carrier, a rotary doctor for the carrier, and a scraper located at a distance trom the point Where the carrier applies glue to material ted pastit, said doctor and scraper being below the plane of the top of the glue carrier to permit said material to receive a stripe of glue While travelling in a straightI path.

ln testimony whereof We have atlixed our signatures.

LEON E. LA BOMBARD. MELVIN H. SIDEBOTHAM. 

